|Diameter(mm)||O.D of stem(mm)||Length of stem|
1. Fold the filter paper in half, twice consecutively, and fold it into the shape of 90° central Angle.
2. The folded filter paper, according to one side of three layers, the other side of a layer of open, into a funnel.
3. Put the funnel-shaped filter paper into the funnel with the edge of the filter paper lower than the edge of the funnel. Pour some water into the mouth of the funnel, make the soaked filter paper stick to the inner wall of the funnel, and then pour the rest of the water away for use.
4. Put the funnel loaded with filter paper on the funnel rack used for filtration (such as the ring of the iron rack), accept the filtrate beaker or test tube under the funnel neck, and make the tip of the funnel neck on the wall of the acceptance container, in order to prevent the liquid from splashing.